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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7mm wsm
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<blockquote data-quote="Methow Packer" data-source="post: 1518981" data-attributes="member: 67515"><p>What is it in some barrels that create higher velocity? I have Brux barrels on three of my rifles. Each one is the same configuration. Each one gives higher velocity than what load info suggests. Example 270WSM with 140Bergers gives me 3155 fps from Lab Radar with 63 grain Re26. That charge is 3 grain below max charge listed at Alliant and @ 63 grains is max for this rifle. Slight bolt lift. Other rifles are similar. 243Win with 105 Bergers running 3108 with Re 23. That's fast for a 243Win without excessive pressure. So is it the barrel lands and grooves? Boar design typical for Brux barrels? Not complaining. They are .5 MOA rifles with good usable velocity. Just mighty curious.</p></blockquote><p></p>
[QUOTE="Methow Packer, post: 1518981, member: 67515"] What is it in some barrels that create higher velocity? I have Brux barrels on three of my rifles. Each one is the same configuration. Each one gives higher velocity than what load info suggests. Example 270WSM with 140Bergers gives me 3155 fps from Lab Radar with 63 grain Re26. That charge is 3 grain below max charge listed at Alliant and @ 63 grains is max for this rifle. Slight bolt lift. Other rifles are similar. 243Win with 105 Bergers running 3108 with Re 23. That's fast for a 243Win without excessive pressure. So is it the barrel lands and grooves? Boar design typical for Brux barrels? Not complaining. They are .5 MOA rifles with good usable velocity. Just mighty curious. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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7mm wsm
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